Heat-insulated dish



C. E. BULTMAN ET Al.

HEAT INSULATED DISH Filed June 26, 1922 INVENTOR. Chfl RLES E. 'B ULTMHN A TORNEY.

Patented Aug. 18, 1925.

UNITED STATES PATENT OFFICE.

CHARLES E. BULTMAN AND HARRY E. MALI, OF CHICAGO, ILLINOIS, ASSIGNOBS TO THE MANTLE LAMP COMPANY OF AMERICA, A CORPORATION OF ILLINOIS.

nnar-msunarnn men.

Application filed June 26, 1922. Serial No. 570,852.

To all whom it may concern Be it knownthat we. CHARLES E. 'BUI.

1 ceptacles in which are included an outer jacket, an inner container and an associated heat-insulated stopper for said receptacles. The invention is especially useful in. the

construction of receptacle for food, either liquid or solid, wherein it is desired to maintain the food at a high or low temperature for a relatively long period of time.

The mouth of the receptacle is made comparatively large for convenience in the introduction and the dispensing of food and in the cleaning of the receptacle.

One ofthe features of this invention. is the heat-insulated stopper, and the means fpr supporting said stopper in the receptac e.

The invention admits of the useof porcelain or glass, or other non-corrodible material, in the construction of the inner container the outer jacket and the stopper thereby avoiding unsanitary crevices and scams which are common in corrodible metalliccontainers and in corkage units made from cork or snmlar material.

our inventlon, is sanitary, has high heatinsulating efiiciency, and, on account ofits unique construction, may be made in any shape or size and as ornamental as desired.

Further advantages in the design and '40v construction of the receptacle, and in the process of manufacture, are described hereinafter in the specification.

The nature of the invention will be rendered apparent by the following specification when read in connection with the accoinpanying drawings in which.

Fig. 1 is a view in elevation, parts being broken away to show the essential features of the receptacle in section, and I Fig. 2 is a sectional view showing a modification of thecorkage unit or stopper .and its seat.

The heat-insulated receptacle 1 comprises an outer jacket 2, an inner container 3 and A ,corkage unit 'made in accordance with undiscernable.

sirable, since a heat-treated materlal, such a stopper 4. For a sanitary reason and also on account of the required heat-insulating properties, these parts are preferably made ofglass or other vitreous material, or of some material which has a vitreous coating. If glass be used it is preferable to line the inner wall of the outer jacket, the outer wall of the inner container, and the interior wall of the stopper with a reflecting coatin 3, which may be metallic silver.

anels or other decorations may be employed on the various parts of the outer jacket to enhance its artlstic appearance.

The outer jacket 2 and the inner container 3 are, respectively, provided with telescopving conical necks 5, 6 united by a bonding seal 7. This bonding seal may be composed of any suitable bonding material such as shellac, which is heated and hardened to form a. bond. A preferable process of making the bond between the inner container and the outer jacket, when these parts are made from glass, is to first coat the outer wall of the inner container and the inner wall of the outer jacket with an opaque coating, such as metallic silver, and then to saturate a strip of fabric 8, such as cotton, with the unhardened bonding material, and wrap this strip of fabric around the outside of the neck of the inner container. The container is then pressed into the outer jacket, until the top edges of said container and jacket are approximately level. The bonding material is then heated and hardened by subjecting it, as well as the re ceptacle, to suitable heat treatment, thus eii'ectuating the union of the parts.

An advantage of the rocess thus outlined, is that, by first coatmg the inner container and the outerjacket with an opaque coating, the bonding material is rendered This concealment is deas shellac, is black in color when hardened by the heat treatment.

It is slightly elow the level of the tops of the container and jacket,- and to surmount the bond by a protective gasket 9 of metal. The

metal which' has been found suitable for practical use in this relation is an alloy containing e ual parts of lead, t1n and bismuth, this a loy eing readily fusible, and

becoming adherent to glass. The presence preferable to position the bond 7 of this gasket is advantageous, inasmuch as said gasket reinforces and protects the organic bond. In applying the metal seal, the receptacle is first heated to approximately the melting point of the metal alloy, and then the metal is melted and run into place, an ordinary soldering iron or small torch being employed for the purpose. This method of applying the metal seal largely precludes the introduction of tem erature stresses in the receptacle when it is made from vitreous material.

It is not necessary to use the metal seal,

- although its use is desirable, the light silvery color of the alloy giving a better appearance than the dark organic seal. The metal seal is easily finished by grinding to make it flush with the top edges of the container and the jacket.

The top of the outer jacket is curved at 10, and the top of the inner container is bevelled at 11. Finishing these edges in this manner, tends to prevent said edges from being chipped and broken away. The

inner container is provided with an annular seat 12 on which the corkage unit may rest. Said unit is provided with a shoulder or seat 13 for engaging the seat 12. the body portion or closure 4 being made slightly smaller than the neck 7 of the container 3 to leave an air space and lessen heat conductivity. t

The seat 12" for the corkage unit, as shown in Fig. '2, is in the form of a rib or bead, and the corkage unit is itself provided with a groove 13 which fits the head. This construction affords a tighter joint than is produced by the seats 12 and 13 shown in Figure 1.

The corkage unit 4 is hollow, and is closed by a hollow knob, or handle, 14, and said knob is widened at 15 to conceal the bond 16 which unites it to the corkage unit 4.

This unit, if made of clear glass, is, as previously stated, interiorly silvered to reflect heat rays. The knob on handle is also hollow and is interiorly'silvered. The corkage unit and the knob are both silvered before they are united. The wall of the knob extends inward at 15, and then is deflected downward to form a strengthening flange wall of the jacket having opaque coatings,-

said bonding seal being disposed between said coatings. i

*2. A heat-insulated receptacle including an inner container having an exterior opaque wall coating, an outer jacket having an interior opaque wall coating, and a concealed heat-treated and hardened organic bondin seal disposed between said container and said jacket at the upper extremities thereof.

3. A heat-insulated receptacle, an inner container, an outer jacket, a bond ing seal uniting said container and said jacket and a metal superimposed on said bonding seal.

4. A heat-insulated receptacle including an inner container. an outer jacket. a bond uniting said container and said jacket, and a metal superim osed on said bond, said metal having a owerfusing temperature than said bond.

5. A heat-insulated receptacle including a glass inner container having its exterior wall covered with a reflecting coating, an outer jacket and a heat-treated and hardened organic bonding seal uniting said container and said jacket, said coating extending between said container and said seal.

6. A heat insulated receptacle including an inner glass container having its exterior wall silver coated, an outer jacket, and a heat-treated and hardened shellac bond uniting said container and said jacket, the silver coating extending between said container and said bond.

7. A heat-insulated receptacle including a glass inner container having an opaque outer coating at its top, an outer jacket, and a bond disposed between said coating and the said jacket for uniting said container and said jacket.

8. A heat-insulated receptacle including a glass inner container having an opaque outer coating at its top, an outer jacket having an opaque inner coating at its top and a bond disposed between said coatings for uniting said container and said jacket.

9. A heat-insulated receptacle includingincludin bonding sealuniting said. container and said jacket, said bond being composed of a fabric saturated with an organic material and heat-treated in situ. i

10.- A heat-insulated receptacle including an inner vitreous container, an outer jacket. a vitreous corkage unit, and a bonding seal uniting said container and said jacket, the interior wall of said corkage unit and the exterior wall of said container having silver coatings, one of which coatings is substantially a continuation of the other.

11. A heat-insulated receptacle including an inner vitreous container, an outer jacket.

and a bond uniting said container and said jacket. the surfaces to which said bond is secured being covered each with an opaque coating.

12- The process of making a heat-insulated receptacle having an inner vitreous container, an outer jacket, and a bond uniting said container and said jacket, consisting in coating the exterior wall and the neck of said container. with an opaque substance, and subsequently bonding the necks of said container and said jacket.

13. The process of making a lieat-insulated receptacle, including an inner container, an outer jacket, and a shellac bond uniting said container and said jacket, consisting in saturating a fabric with shellac and placing the saturated fabric in position between said container and said jacket' and heat treating the' shellac to effectuate a bond.

14. A heat-insulated receptacle including an inner vitreous container, anouter jacket,

and a metallic bond directly and adherently uniting said container and said jacket 15. A heat-insulated receptacle including an inner vitreous container having an annular offset seat near its upper end, and a vitreous corkage unit spaced from the neck" of the container and having a shoulder ex tending over said seat the nature of said seat avoiding a wedging action.

16. A heat-insulated receptacle including an inner vitreous-container having a beaded annular seat, and a vitreous corkage u'nit having a groove substantially fitting said seat.

17. A corkage unit includin a hollow,

opaque and frangible body, a ho ow, opaque and frangible knob, and a concealed bond for uniting said body and saidknob.

18. A corkage unit including a frangible hollow body internally silvered, and an internally silver-ed knob bonded tosaid body and obscuring the bond.

19.v A heat-insulated receptacle including a glass inner container having an opaque outer coating at its top, an outer jacket having an opaque inner coating at its top and material solidified in situ disposed between said coatings for uniting said container and said jacket said material being concealed by the coating of said inner container.

20. A heat-insulated receptacle including a glass inner container having an opaque outer coating at its top, an outer jacket, material hardened in situ disposed between said tures. 7

CHARLES E. BULTMAN. HARRY E. MALI. 

